Boiler-cleaner



Patented Au fzs, I808.

F. T. ANDREWS & w. B. JOHNSON.

BOILER CLEANER.

(Application filed July 23, 1897.) (N 0 M 0 d e I m: NoRRIs versus coy. PNOTO-L|THO., WASHINGTON. o. 1:.

- ll ITE FRANK T. ANDREWS, or CLEVELAND, AND WILLIAM R. JOHNsON, or

' BURTON, OHIO.

BOILER-CLEANER.

SPECIFICATION forming part of Letters Patent No. 609,400, dated August 23, 1898.

Application filed July 23, 1897. Serial No. 645,714:- (lTo model.) i

To ctZZ whom it may concern.-

Be it known that we, FRANK T. ANDREWS, of Cleveland, county of Cuyahoga, andv (VIL- LIAM R. JOHNSON, a citizen of the United States, residing at Burton, in the county of Geauga, State of Ohio, have invented certain new and useful Improvements in Boiler-Cleaners, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention has reference to an improved apparatus for preventing incrustation in steam-boilers.

The principal object of the invention is to provide a simple apparatus of the type referred to that may be used in connection with any ordinary boiler or water-heater and which shall be of such constructionthat a continuous discharge of water, of minimum quantity, will take place from the boiler through said apparatus. Thus the contents of the boiler or heater will be constantly disturbed and the scale-forming matter, instead of adhering to the interior of the boiler-shell, will be kept in suspension in the water and will eventually be discharged with the latter through the apparatus. It has been found by careful tests that but a slight discharge from the boiler, if such discharge is constant, is necessary to obtain the above results and that such a minimum discharge produces less Waste of the boiler contents than when ordinary boilercleaners are employed, which require frequent cleaning by being blown out.

A further object of ourinvention is to provide the apparatus with means for collecting and retaining such of the foreign matter in the water as will notreadily pass through the main discharge-passage and with devices for removing the matter thus collected when desired.

With these objects in view our invention consists, essentially, in a boiler-cleaning apparatus comprising an outlet-pipe having communication with the boiler or heater at a point below the water--level, whereby the steam-pressure will cause a constant flow of the water through the apparatus, and in a waste-pipe having a restricted communication with the outlet-pipe, the restricted passage controlling and reducing to a minimum thedischarge of the water and being preferably, though not necessarily, in the form of a jet ornozzle.

The invention further consists in the peculiar and novel constructionof the devices for collecting the foreign matter; and the invention still further consists in the means employed for discharging the foreign matter thus collected and in various other details of construction of said apparatus, as will be more fully hereinafter described, and shown in the drawings, in which Figure 1 is a diagrammatic view of our apparatus, showing the same attached to an ordinary type of boiler; and Fig. 2 is a side elevation of the apparatus, showing the same detached from the boiler and partially in section in order to more clearly illustrate the essential parts thereof.

In Fig. 1 the letter A represents a boiler or heater,which may be of any preferable construction, and B an outlet-pipe leading therefrom at a point below the water-line. A valve A is preferably arranged in the outlet-pipe for purposes hereinafter set forth, and a Waste-pipe O is adapted to communicate with said outlet'pipe through a restricted passage, preferably in the form a nozzle or jet D.

In the apparatus thus described the water is caused to flow by the action of the steam through the outlet-pipe and discharge-passage and is allowed to escape through the waste-pipe. If desired, the water may be returned to the boiler after passing through suitable filters or mud-drums; but this is not essential, as it may be allowed to flow directly into a catch-basin or other similar device.

In the construction of apparatus that we preferably employ a settling-chamber E is interposed between the outlet and waste pipes,.said chamber being transversely disposed and communicating through an opening F at one end at the top with the outletpipe and at the bottom and at the other end through a suitable discharge-opening with the Waste-pipe C. This latter opening is internally screw-threaded, as at G, and is adapted to receive the jet or nozzle D, which is in turn externally threaded at J to permit of its engagement in the threaded opening in the chamber.

In construction the nozzle comprises a body portion K and a jet or nozzle proper, L, the latter extending at a considerable distance above the bottom of the chamber for reasons hereinafter set forth. Directly above the nozzle a threaded plug M is arranged withinthe chamber, and at one side of the jet, opposite the supply-pipe,said chamber is provided with an auxiliary discharge-opening N. Oommunicating with this opening and with the supply-pipe C at a point 0 is an auxiliary valve-controlled discharge-passage or by-pass P, said discharge-passage comprising ordinary pipe sections and fittings and being provided with a valve Q of any approved type.

When our apparatus is first applied to a boiler, it is frequently found that on account of the excess of foreign matter therein a greater discharge from the boiler is necessary than when the apparatus has been some time in use. This being the case it is desirable to construct the apparatus so as to permit jets or nozzles of different sizes to be easily inserted within the settling-chamber, and we preferably construct the waste-pipe in such manner that jets or nozzles may be attached or detached as desired. The waste-pipe is therefore formed in two parts R and S, the latter member being externally screw-threaded upon its free end to engage with an internal screw-thread T upon the interior of the nozzle and the two members of the pipe being coupled together by a union U. As thus set forth it will be seen that a continuous discharge of the boiler contents will take place through the apparatus, and the amount of this discharge will be regulated to a nicety by the size of the nozzle inserted within the settlingchamber. It is to be further observed that by employing a settling-chamber arranged as set forth such particles of foreign matter as will not readily pass through the nozzle will be collected therein, thereby preventing the clogging of the main dischargepassage of the apparatus. noticed that by having the by-pass or auxiliary discharge-passage communicate with the chamber at a point near its bottom and at a point below the free end of the nozzle the chamber contents may be entirely and quickly removed by simply opening the valve Q and that any particles of foreign matter that may have become lodged upon the top of the jet will be removed therefrom by the water striking against said nozzle at practically right angles.

In extreme cases where the nozzle has become clogged and the matter cannot be dis lodged from the same by means of the auxiliary passage the valve A in the supply-pipe may be closed and the plug M removed from the chamber, whereby direct access may be had to the nozzle and the foreign matter removed from the latter by means of a wire or other like device.

It will be readily observed from the description of the invention as set forth that a set- Also it will be.

fling-chamber is not an essential element of the apparatus and that when used various types may be employed and differently located without departing from the spirit of our invention, which consists, essentially, of an outlet-pipe communicating with the boiler at a point below the water-line and in a wastepipe having a restricted communication with the outlet-pipe, through which apparatus a slight but continuous flow of water is adapted to pass. It is also to be noticed that while we have shown means in the form of a valve-controlled discharge-pipe for cleaning the apparatus the mechanism may be used without this element and still perform its function. Moreover, while we have shown the dischargepipe as communicating with the outlet and waste pipes, forming a bypass between the two, it is not desired to limit ourselves to this particular construction, as the cleansing-pipe may discharge into any desired receptacle or various other methods may be employed to cleanse the apparatus that will be embraced within the scope of our invention.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-

1. In a boiler-cleaner, the combination with a boiler, of an outlet-pipe leading from said boiler at a point below the water-line, a waste pipe having a restricted communication with the outlet-pipe, and a valve-controlled discharge-pipe communicating with the outletpipe.

2. In a boiler-cleaner, the combination with a boiler, of an outlet-pipe leading therefrom at a point below the water-line, a waste-pipe communicating with the outlet-pipe, a nozzle interposed between said pipes through which the water in the boiler is adapted to be forced and to constantly flow, and a valve-controlled discharge-passage communicating with the outlet-pipe at a point below the nozzle.

3. In a boiler-cleaner, the combination with the boiler, of an outlet-pipe leading therefrom at a point below the water-line, a waste-pipe communicating with the outlet-pipe, a nozzle detachably arranged between said pipes through which the water from the boiler is adapted to constantly How, and a valve-controlled auxiliary discharge-passage-or by-pass communicating with the outlet-pipe and the waste-pipe.

4. In a boiler-cleaner, the combination with a boiler, of a settling-chamber having a pipe connection therewith at a point below the water-line, a waste-pipe having a restricted communication with the settling-chamber, and a valve-controlled discharge-pipe communicating with the settling-chamber at a point near the bottom thereof.

5. In a boiler-cleaner, the combination with the boiler, of a settling-chamberhavingapipe connection therewith at a point below the water-line, a waste-pipe having a restricted communication with the settling-chamber, and an auxiliary valve-controlled discharge- IIO passage or by-pass connecting the chamber with the waste-pipe.

6. In a boiler-cleaner, the combination with the boiler, of a settling-chamber having a pipe connection therewith at a point below the water-line, a nozzle communicating with the settling-chamber, a waste-pipe communicating with the nozzle, and an auxiliary valvecontrolled discharge-passage or by-pass connecting the settling-chamber with the waste- P 7. In a boiler-cleaner, the combination with the boiler, of a settling-chamber havinga pipe connection therewith at a point below the water-line, a nozzle detachably secured within the chamber and communicating with the latter, a waste-pipe communicating with the nozzle, and an auxiliary valve-controlled discharge-passage or by-pass connecting the settling-chamber at a point below the nozzle,

I with the waste-pipe.

8. In aboiler-cleaner, the combination with the boiler, of a settlingchamber havinga pipe connection therewith at a point below the water-line, a nozzle detaehably secured within the chamber and communicating with the latter, a plug in said chamber above the nozzle, a waste-pipe communicating with the latter, and an auxiliary valve-controlled dischargepassage or by-pass connecting said settlingchamber, at a point below the nozzle, with the waste-pipe.

9. In a boiler-cleaner, the combination with the boiler, of a valve-controlled outlet-pipe leading therefrom, a waste-pipe, a transversely-disposed horizontal settling-chamber communicating with said pipes, a nozzle detachably secured within the chamber above the waste-pipe and communicating with the latter, a plug in said chamber above the nozzle, and an auxiliary valve-controlled dis-.

charge-passage or by-pass communicating with the settling-chamber at a point below the free end of the nozzle, and with the wastepipe, substantially as shown and described.

10. In a boiler-cleaner, the combination with the boiler, of an outlet-pipe leading therefrom at a point below the water-line, and a wastepipe having a restricted communication with the outlet-pipe, through which restricted passage the water from the boiler is adapted to be forced, whereby a slight but continuous discharge of the boiler contents is obtained.

1 1. In a boiler-cleaner, the combination with a boiler, of an outlet-pipe leading therefrom at a point below its water-line, a waste-pipe communicating with the outlet-pipe, and a nozzle, detachably arranged within, and at substantially the junction of, the two pipes, through which nozzle water from the boiler is adapted to be forced and to constantly flow.

In testimony whereof we affix our signatures in presence of two witnesses.

FRANK T. ANDREWS. WVILLIAM R. JOHNSON. WVitnesses:

L. J. WHITTEMORE, MORRIS BLACK. 

